Tool support



'Dec- 1944- c. E. PETERS-ON ET AL 7 2,366,050

TOOL SUPPORT Filed 001;. 15, 1941 Patented Dec. 26, 1944.

ES PATENT OFFICE" TOOL SUPPORT Conrad E.Peterson, Auburndale, and GordonL.

Olson, Arlington, Mass.

, .Application October 15, 1941, Serial No. 415,050

1 Claim. (01. 29-48) i This invention relates to machine tools and is.more especially concerned with the structures in which the tool ortools in such machines are mounted for operation on, the work.

a The invention will be herein disclosed as embodied in a turretstructure adapted to be used either in a turret lathe or in an enginelathe, it being understood, however, that the invention is not, limitedin its application to use in either of these machines. a

,When a turret is mounted on the tool car- .riage or, compound. of anengine lathe, the regular adjustments commonly used in presenting thetool to the work may be employed, but

if a series of such tools are to be used and the elevations at whichthey operate on the work vary from each other,,then the matter of adjustingjth tools becomes more complicated,

often requires shimming, and consumes valuable time or a skilled worker.

The present invention is especially concerned with considerations ofthis nature, and itaims to devise a tool mounting which will facilitateFigs. 3 and 4 are end views of typical tool holders adapted to be usedin the turret shown.

In the construction illustrated in the drawing, the turret comprises abody 2 mounted to rotate on a stationary index plate 3, around a post 4,and the lower portion of said post projects loosely through a hole in aplate 4, its flanged end fitting freely in the T-slot of the upper slide5 of a compound. This post has; a threaded engagement with the indexplate 3 and it projects upwardly for a considerable distance above theturret body and is threaded at its upper end to receive a nut I providedwith a handle. In assembling this structure on a compound, the lowerflanged end of the post with its plate 4 are slipped into the T-slot ofthe tool carriage or compound, the index plate 3. is threaded on to thepost and is tightened up, either by rotating the plat itself or thepost. When the plate has been properly located it is secured there byturning down the set screw ll.= The spring 6 and the sleevewhich itencircles are then slid on to the post which is nowheld stationary byits association with the plat and the slide 5, as just described; thebody 2 of the turret is slipped on to the post, together with the heavywasher at the upper end of it, and then the nut I is threaded on to theupper end portion of the post. a I

Thereafter the turret body is located in any indexed position by the pin8 which enters any desired one of a series of holes in the index plate,after which the turret bodyis forced downwardly by revolving th nut, 1,thus locking said body securely to the plate 3. Whenit is desired tochange the position of the turret, the clamping nut I is backed off torelease said body, which thereupon is lifted by th spring 6 until thestud fl is withdrawn from the hole in which it has been positioned. Thisallows th body to be rotated about the axis of the post to a, newposition ,where it will be secured by turningdown the nut I again.

, So tar as the general turret structure is con I3 which is held inplace by set screws M. The

plots have upright walls laterally confining the forming a socket ofsuch contour as to grip the partsof the holder with only suflicient playfor easy movement, and the opposed faces of the two sections II and I2are shaped, as indicated for instance in Figs. 3. and 4, to cooperate inshank of a tool or tool bit l5. Threaded through the portion of theturret immediately above the slot II) are two set screws IE which, asclearly shown in Fig. 2, bear on the upper section ll of the tool holderin line with the socket in it and at opposite sides of the axis of thepivot l3. Consequently, by turning up these set screws, the tool l5 maybe clamped securely between the two sections of the tool holder. Also,by backing out one screw and turning up the other the angle of the toolmay be adjusted in a vertical plane, this adjustment taking place aroundthe pivot [3. Thus the screws operate new tool.

The same construction is used in any desired number of the five slotsprovided in the turret,

the requirements of the individual jobs. It should be observed that thetool gripping surfaces of the work. Naturally the particular kind oftools used and the number of them, will depend upon the clampingsections H and 12 can readily be,

machined or ground to fit accurately the bits used for any individualpiece of work, and that these jaws provide gripping surfaces of largearea.

This fact, together with the nature of the clamp I ing devices provided,means that thetools. may

be gripped very rigidly and securely and danger of breaking them due touneven clamping pressure can be minimized.

It will be evident to those skilled in this art that such a constructionas that above described materially facilitates a machinists work inmaking the initial adjustment of thetools required for a particular job,inv shifting from one tool to another, and in replacing tools after theyhave been ground and bringing them again into their correct positions.

In changing tools, if a different construction of a tool holder jaw isrequired, the set screws |4.l4 for any individual slot may be backedout, thus releasing the pivot pin l3v for that slot,

whereupon it may be driven out, the jaws previouslyused may be removedand instantly replaced with a new pair of the desired shape for the Thematter of re-inserting the pivot pin and securing it in. place requiresbut a momentstime, and the clamping and adjustment desire to claim asnew is:

of the tool in. its proper positionmay be per? formed quickly inv themanner above described. It should also be observed that the index plate3 canbe revolved about the post 4 in order to bring the tool holdersinto the desired relation ship to the work and that when the turret hasbeen so adjusted it can be locked in its adjusted position by turning upthe set screw l1, Fig. 1,

which is threaded through the index plate in position to bearv on theupper machine surface of the slide 5. This adjustment is quiteindependent of the indexing movements of the turret.

While we have herein shown and described.

a preferred embodiment of our invention, it is contemplated that theinvention may be embodied in other forms without departing thespirit orscope thereof.

Having thus described our invention, what we from In a tool supportingstructure, the combination of a turret mounted for indexing movement,said turret being provided with a plurality of upright slots in the edgethe1eof, a tool holder-"positioned in one of said slots and adapted tosupport a tool in an approximately horizonta-lposition, a pivotextending horizontally through'said slot transversely thereto;saidholder being1diaxis of said pivot whereby they are operable toadjust said holder angularly about said, axis.

CONRAD E. PETERSON.

GORDON L. OLSON.

